Polycyclo Ring System Having The Hetero Ring As One Of The Cyclos Patents (Class 549/358)
- The two cyclos share at least three ring members (i.e., bridged) (Class 549/363)
- Three or more ring oxygens in the bicyclo ring system (Class 549/364)
- The ring oxygens are in the 1,2- or 1,3-positions of the hetero ring (Class 549/365)
- Nitrogen attached indirectly to the hetero ring by acyclic nonionic bonding (Class 549/366)